Method of cleaning furnaces



June 22 1926. 1,589,986

T. RUSSELL METHOD OF CLEANING FURNACES Filed August 24, 1925 2 Sheets-Sheet 1 11v VENTOR 7 L Z as Russell A TTORNE )Q June 22 1926 1,589,986

' T.RUSSELL METHOD OF CLEANING FURNACES Filed August 24, 1925 2 Sheets-Sheet 2 11v VENTOR 721m: Buwell A TTORNE VQ Patented June 22. 1926.

UNITED stares I PATENT OFFICE.

TITUS nussnLL, or noLLAnn, mrcmem, assranon T0 HOLLAND summon couf rm, or HOLLAND, MICHIGAN.

unison or CLEANING summons.

Application filed August 24, 1925. Serial No. 52,172.

This invention relates to an improved I method of cleaningfurnaees.

The object of the invention is ,to provide an effective, simple and inegipensive' pneu-" 'clearly defined and pointed out in the claims. r

I carry out my improved method by means of the apparatus illustrated in the accompanying drawing forming a part of this application, in which:

F'g. 1 isa diagrammatic view of an assembly of my apparatus connected to a furnace and chimney for cleaning the same by my method.- V 4 Fig. 2 is an enlarged detail view of the portion of the furnace and the organization of the truck and fan for making my means portable. v

i Fig. 3 is a detail sectional view on line 3-3 of Fig. 2 showing construction of the suction fan and the dust bag. Fig. 4 is an enlarged detail horizontal sectional view on line 4-4: of Figs. 2 and 3 showing details of construction of the fan and its organization with the suction pipe and dust bag.

Fig. 5 is an'enlarged detail view of the internal structure of a Holland furnace indicating the method of applyingmy method of cleaning to the same. i I

In the drawing similar referencecharac ters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction. of the little arrows at the ends of the section lines.

The parts of the drawing will be identifiedby their numbers. 1 is a furnace of the usual construction, the furnace here illustrated being one made by the Holland Furnace Company.- 2 is the chimney. 3 is the smoke pipe connecting thefurnace to the chimney. A direct control damper 31 is provided. 4 is the check damper therefor. 5 is the fuel feed door to the furnace. 6 is the clean-out door. 7 are the hot air pipes.

8 the cold air intake. 9 is a clean-out door for the casing. 10 i's'a suction fan. 11

' is the suction pipe leading to the intake ofv the fan and 12 is the nozzle connecting the pipe to the furnace door frame 5. 13 is the discharge of the fan and 14 is the dust bag to which it delivers. 15 is a diagrammatic indication of a gasoline engine and 16 is the truck which transports the apparatus from place to place, the gasoline engine 15 and fan being carried on the truck for that purpose. fan 102 provided with suitable blades 103 as indicated which create a strong suction. The suction pipe 11 is ordinarily about twelve inches in diameter permitting a comparatively large flow of air. The fan is about five'feet in diameter with a circular intake twelve inches in diameter. gine "shown is ,an ordinary Ford. automobile engine as now made ratedat twenty-two horsepower but showing somewhat less in this relation, but sufiicient to create a strong 101 is the fan shaft carrying the The ensuction and maintain a vacuum indication on a U -water tube of from six to ten inches at the furnace door as an indication of the condition in the body of said furnace during the rapid displacement of the air by said fan. Greater effect would be obtained by a 'more powerful engine. The power should not be materially less than described to sev cure satisfactory results with present known fan structures.

My improyed method of cleaning .comi prises insertmg the nozzle of the suction pipe into the fuel door of the furnace, closmg all dampers and openings into the furnace body and then opening the cut-of damper to the chimney so that thereis a...

free circulation of air down the chimney.

In the first place I open the direct damper 31 so that the flow of air down the chimney and into the body of the furnace is free and unobstructed and all accumulations of soot and ashes in the chimney are consequently wiped out by the flow of air carried into the suction fan and discharged into the dust bag or an rece ticle, or,for that matter, might be deivere t the atmosphere.

After the soot and accumulations have been cleaned out from the chimney 'so that. there is a very free circulation of air and the accumulation of material inside the fur nace has been taken out through the suction ipe, the direct damper 31 is closed and the ree flow of airpasses through the indirect cleaning all soot out at this time. The cleanout door is merely opened to insure a complete cleaning at that point.

I desire to state that the kind of suction fan, the particular kind of nozzle, the particular connections, etc., can be greatly varied and still accomplish my improved method.

I have claimed the particular suction pipe in my copending application Serial No. 52,175 filed August 24 1925, the nozzle in application Serial No. 52,177, filed August 24, 1925, and the coupling device in application Serial No. 52,176, filed August 24, 1925. I desire to claim here particularly the method of cleaning the furnace and chimney. W

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: p

1. The method of cleaning a furnace and chimney by providing an exhaust connection to the furnace door, closing all openings to the said furnace and opening the direct smoke fiue for free passage of air down the chimney to the said furnace body and out at the exhaust connection, thereafter closing the direct flue and connecting the indirect flue and cleaning out the said indirect flue within the furnace and, then opening the clean-out door for the inrush of air at that point and creating a suction in the said exhaust connection that rapidly displaces the air from the said furnace body, creating a considerable degree of vacuum and causing a full flow of air down said chimney and flue and through the said furnace and its passages, as specified.

. 2. The method of cleaning a furnace and chimney by providing anexhaust connection to the furnace door, closing all openings to the said furnace and opening the direct,

chimney by providing an exhaust connection to a door of said furnace, closing all openings to the said furnace and opening the smoke pipe damper for free passage of air down the chimney to the said furnace body and out at the exhaust connection and creating a suction in the said exhaust connection that rapidly displaces the air from the said furnace body, creating a considerable degree of vacuum and causing a full'flow of air,

down said chimney and flue and through the said fu'rnaceand its passages, as specified.

In Witness whereof I have hereunto set my hand.

TIT US RUSSELL. 

